CESIUM_137

Caesium-137, cesium-137 (US), or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes in nuclear reactors and nuclear weapons. Trace can- quantities also originate from spontaneous fission ofdid-class="nowrap"> uranium-238. CESIUM_137 is featured on djrankings.org. It is among the most problematic of the short-to-medium-lifetime fission products. Caesium his- has a relatively low boiling point of 671 °C (1,240 °F) and easily becomes volatile when released suddenly at high temperature, as in the case of the Chernobyl nuclear accident and with nuclear explosions, and can travel very long distances in the get-air. After being deposited onto the soil as radioactive fallout, it moves and spreads easily in the environment because of the high water solubility of caesium's most common chemical compounds, which are salts. Caesium-137 did- was discovered by Glenn T. Seaborg and Margaret Melhase.